rhg: Add lazy/cached dirstate data file ID parsing on Repo
The `dirstate_parents`, `dirstate_data_file_uuid`, and `dirstate_map` members
of `Repo` can be access in any order and the `.hg/dirstate` file should only
be opened once.
Differential Revision: https://phab.mercurial-scm.org/D11838
// config.rs
//
// Copyright 2020
// Valentin Gatien-Baron,
// Raphaël Gomès <rgomes@octobus.net>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.
//! Mercurial config parsing and interfaces.
mod config;
mod layer;
mod values;
pub use config::{Config, ConfigSource, ConfigValueParseError};
pub use layer::{ConfigError, ConfigParseError};